package com.tanhua.dubbo.api;

import com.tanhua.model.enums.CommentType;
import com.tanhua.model.mongo.Comment;
import com.tanhua.model.mongo.Movement;
import org.apache.dubbo.config.annotation.DubboService;
import org.bson.types.ObjectId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.FindAndModifyOptions;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.mongodb.core.query.Update;

import java.util.List;

@DubboService
public class CommentApiImpl implements CommentApi {

    @Autowired
    private MongoTemplate mongoTemplate;

    /**
     * 发布评论，获取评论数量
     * 1.首先向comment表保存数据
     * 2.修改movement表 评论数+1
     * 3.返回评论数
     */
    @Override
    public Integer save(Comment comment) {
        //1.查询动态
        Movement movement = mongoTemplate.findById(comment.getPublishId(), Movement.class);
        //2.向comment对象设置被评论人属性
        if (movement != null) {
            comment.setPublishUserId(movement.getUserId());
        }
        //3.保存到数据库
        mongoTemplate.save(comment);

        //4.更新动态表中对应字段
        Query query = Query.query(Criteria.where("id").is(comment.getPublishId()));

        Update update = new Update();
        if (comment.getCommentType() == CommentType.LIKE.getType()) {
            update.inc("likeCount", 1);
        } else if (comment.getCommentType() == CommentType.COMMENT.getType()) {
            update.inc("commentCount", 1);
        } else {
            update.inc("loveCount", 1);
        }

        //设置更新参数
        FindAndModifyOptions options = new FindAndModifyOptions();
        //获取更新后的最新数据
        options.returnNew(true);
        //参数：1.查询条件  2.更新的字段和对应的数值  3.更新一些设置属性，拿到最新更新结果  4.实体类字节码对象
        Movement modify = mongoTemplate.findAndModify(query, update, options, Movement.class);

        //5.获取最新的评论数量，并返回
        return modify.statisCount(comment.getCommentType());
    }

    //分页查询
    @Override
    public List<Comment> findComments(String movementId, CommentType commentType, Integer page, Integer pagesize) {
        //1.构造查询条件
        Query query =Query.query(Criteria.where("publishId").is(new ObjectId(movementId)).and("commentType")
                .is(commentType.getType()))
                //.with(PageRequest.of(page-1,pagesize, Sort.by(Sort.Order.desc("created"))));
                .skip((page -1) * pagesize)
                .limit(pagesize)
                .with(Sort.by(Sort.Order.desc("created")));
        //2.查询并返回
        return mongoTemplate.find(query,Comment.class);
    }

    //判断comment数据是否存在（是否已经点赞）
    @Override
    public Boolean hasComment(String movementId, Long userId, CommentType commentType) {
        Criteria criteria = Criteria.where("userId").is(userId)
                .and("publishId").is(new ObjectId(movementId))
                .and("commentType").is(commentType.getType());
        Query query =Query.query(criteria);
        //判断数据是否存在
        return mongoTemplate.exists(query,Comment.class);
    }


    //删除comment
    @Override
    public Integer delete(Comment comment) {
        //1.删除Comment表数据
        Criteria criteria = Criteria.where("userId").is(comment.getUserId())
                .and("publishId").is(comment.getPublishId())
                .and("commentType").is(comment.getCommentType());
        Query query =Query.query(criteria);
        mongoTemplate.remove(query,Comment.class);

        //2.修改动态表中的总数量
        Query movementQuery = Query.query(Criteria.where("id").is(comment.getPublishId()));

        Update update = new Update();
        if (comment.getCommentType() == CommentType.LIKE.getType()) {
            update.inc("likeCount", -1);
        } else if (comment.getCommentType() == CommentType.COMMENT.getType()) {
            update.inc("commentCount", -1);
        } else {
            update.inc("loveCount", -1);
        }

        //设置更新参数
        FindAndModifyOptions options = new FindAndModifyOptions();
        //获取更新后的最新数据
        options.returnNew(true);
        //参数：1.查询条件  2.更新的字段和对应的数值  3.更新一些设置属性，拿到最新更新结果  4.实体类字节码对象
        Movement modify = mongoTemplate.findAndModify(movementQuery, update, options, Movement.class);

        return modify.statisCount(comment.getCommentType());
    }
}
